code: def _diff(self, ref_name, ref, doc):
      _diff_entities(ref_name, ref, doc)
  
imports: import datetime
  import decimal
  import difflib
  import json
  import os
  import traceback
  from collections.abc import Iterable
  from typing import Any
label_desc: Use image node_id 3 for calling the ReferenceJson obj's underlying member method code with example usage: obj._diff(ref_name, ref, doc) without return types